Metal bending apparatus



Dec. 15, 1931.

L. E. POOLE METAL BENDING APPARATUS Filed Sept. 16, 1929 5 Sheets-Sheet1 Dec. 15, 1931. E. POOLE METAL BENDING APPARATUS Filed Sept. 16, 1929 5Sheets-Sheet 2 ii. .i

IIL HIII W 73 W WWL Dec. 15, 1931. P L 1,836,501

METAL BENDING APPARATUS Filed Sept. 16, 1929 3 Sheets-Sheet 3 swam WotQKW 5 Patented Dec. 15 1931 UNITED STATES PATENT OFFICE A LORA E. POOLE,OF ANDERSON, INDIANA, ASSIGNOR TO DELOO-REMY CORPORATION, OF

' ANDERSON, INDIANA, A CORPORATION OF DELAVIARE METAL BENDING- APPARATUSThis invention relates to metal bending apparatus and more especially toapparatus for bending a metal strip, such as an elecwhich a metal stripmay be bent, means for maintainin the strip against the form during theben ing operation, an oscillatable support rotating about the axis ofthe cylindrical ortion of the stationary form, means .carried by thesupport for causing the strip to be bent about said cylindrical portion,a movable cutter carried about said support for severing the strip at apredetermined location relative to its bent portion, and

, means for rotating the support.

Further objects and advantages of the present invention will be apparentfrom the following description, reference being had to the accompanyingdrawings wherein a preferred embodiment of one form of the pres- 'entinvention is clearly'shown.

In the drawings:

Figs. 1,2, and 3 are fragmentary diagrammatic plan views of apparatusembodying the present invention showing different stages of operation.

Fig. 4 is a plan view of the apparatus drawn on a larger scale than thepreceding views.

F Fig. 5 is a sectional view on line 55 of igs. 6, 7, and 8 aresectional views taken reslp ectively on line 66, 7-.-7, 88 of Fig.

1g. 9 is a sectional view on line 99 of 27 designates a stationary formblock having a cylindrical surface 28 about which the wire 20 is bentprogressively into positions 20a and 206 shown respectively in Figs. 2and 3. The form block is secured by means not shown to a block 29, andboth blocks are secured to the platform 24 by screws 30 and are locatedby dowels 31. y

The wire 20 is maintained in engagementwith the form during the bendingoperation partly by reason of the fact that this wire eX- tends from thecoil 21 which is maintained in fixed relation relative to the block 27and partly by reason of the fact that the wire 20 is engaged by finger32 extending from a block 33 secured to theplatform 24 by a screw 34 andlocated by dowels 35.

The wire 20 is formed about the cylindrical surface 28 of the stationaryblock 27 by a movable forming block 40 which is mounted eccentricallyupon an oscillatable support or shaft 41 which rotates about the axis ofthe cylindrical portion 28. The block 40 has a surface 42 which isadapted to engage the wire 20 and to cause it to move into the po sitionshown in 20a of Fig. 2. The block 40 has a cutting edge 43 whichcooperates with a stationary cutter- 44 to cut the wire 20 at a certainlocation relative to its bent portion. The cutter 44 is adjustablyreceived by a suitable groove in the block 29 and is secured in thedesired position relative to the block 40 by screws 45. After thatportion of the wire 20vlocated to the left of the cutting edge 43 hasbeen severed, the remaining portion of the wire is bent into theposition 201) as the result of further counterclockwise movement of theblock 40. This completes the opera- V eratedmeans for rotating the shaft41 in a counterclockwise direction as viewed in Figs. 1 to 4 in order toperform the bending and cutting operations, and a spring for returningthe shaft 41 to normal position after these operations have beenperformed. Referring to Figs. 4 to 9 numeral 50 designates a power shaftdriven by any suitable means not shown and driving a worm 51 whichmeshes with a worm gear 52 attached in any suitable manner not shown toa disk 53 having a hub 54 attached to a shaft 55 journalled in bearings56 and 57 located respectively in the platform 24t of frame 25 and in acylindrical boss 58 integral with a base 59. The disk 53 is providedwith an annular row of clutch teeth 60 which are adapted to engageclutch teeth 61 arranged in an annularrrow upon the upper end face of amutilated gear 62 which is loosely rotatable about the shaft 55.Normally the clutch teeth 61aresepa rated from the clutch teeth 60. Thegear 62 is urged away from the-disk 53 and into contact with the disk 63fixed to the boss 58 by springs 64 which are located in spring recesses65 in the hub 54 of disk 53 and which urge plungers 66 against theupper-end face of gear 62. The gear 62 is provided with a 3 segmentallocating lug 70 which is normally received by segmental notch 71 in theblock 63.

The gear 62 meshes with a mutilated gear 80 attached to the shaft 41.The gear 80 is -normally maintained in the position shown in" Figs.4 and7 by a spiral. spring 81 having one end attached to a stud 82 andtheothel to the shaft 11, the spring being constructed and arranged forurging the shaft-41 in a V clockwise direction. Motion of the shaft'tlin this direction is limited by reason of the fact that the gear 80carries a stop lug 83 which engages the inner end of a stop screw 84which is threaded through a. side wall of the housing 25 and which isfixed in the desired position of adjustment by a lock nut 85. The gear62 isnormally maintained in the position shown in Figs. 4 and 7 sincethe lug 4Q 70 is normally received by the notch 71. In this way, the endtooth 80a of gear 80 is nor mally located in the annularspace betweenend teeth 62a-and 62b of gear 62, and gear 80' is normally located inthe path of movement of the gear'teeth of gear 62. 'Hence clocki wiserotation of gear 62 will first cause gear 80 to make aone half turn in acounterclock wise direction in order to move the form block 40 from theposition shown in Fig. 1 to that shown in Fig. 3. Following this thegear80 will be free of the gear 62 so that the spring 81 will beoperative to return the block 40 to normal position by effectingclockwise rotation of the shaft 41.

v The connection of the gear 62 with thegear '52 is controlled by asuitable pedal not shown plate 63 and urged downwardly by a spring- 94.To start the machine into operation, the

4 direction indicated; bynarrow 1 101. in Fig.1-5 ;f0r the purpose.ofrotatmg the shaft 41 as block. cooperating with said shearing-edge,

lower surface of the lug is above the plate 63 thereby causing theclutch teeth 61 to be engaged by the clutch teeth 60. This will causethe gear 62 to be rotated in a direction of arrow 100 in Fig. 5 and thelug 7 0 to be moved out of registration with the notch 71. Then thelever 90 may be released. The gear 62 will continue to rotate asindicated and cause the gear to make a one half turn in the has beenexplained. At the end of one revolution of-gear-62 its locating lug 70will register again witlrtl e notch 71 thereby permittingthe'gear62 tobe lowered due to the action of the s ring urged .plungers 66 which tend.to force tlegear62downwardly thereby separating the clutch teeth 61from the teeth 60. In this waythe, machine .is brought to restautomatically at the end ofone cycle of- 85 its operation. a

While the form of embodiment of the present invention as hereindisclosed, constitutes a preferred form, it is to be understood that.other forms might be. adopted,- all. coming within the scope of theclaims which. follow.

'What is claimed isas follows: 1 .1. Metal bendingaande cuttingapparatus comprising, in combination, a stationary bending" form, meansfor maintainin ametal strip against'the form, and. a sing e rmeans forbending the strip about. the formand for severing the strip at, apredetermined location, relativeto its bent portiomafter part of thebending operation is completed. @100 2. Metal bending and cuttingapparatus comprising, in combination, a stationary form includingacyliridricalportion about which a metal strip, may be bent, meansformaintainingainetal stripagainst the: form,

an oscillatable support rotating abontthe axis of the cylindricalportion of thestationary form,a block carried by the support eccentricto. its aXisand having a surface for engaging the strip. to causethestrip. to be bent around the form, said. blockahavingia shearing edgedefining a. termination ofsaid strip engaging surface, .aStationary-shear and means for rotating the support.

8. :Metal bending apparatus comprising, in

; combination,- a stationary bending form,.having a cylindrical.por-tion,:-means formaintainmg a metal strip against the form, an 06-cillatable support rotating about the axis of the cylindricalportion ofthe stationary form, a forming-block carried by said support eccentricto said axis and having a surface adapted to engage the strip and causeit to be bent around said cylindrical portion, a power shaft, a train ofmutilatedgears for transmitoperator causes the lever 90 to be moved inva clockwise direction as viewed in Fig. 5 there- 65 .by causing the gear62 to be raised until the turning the rotatable support to normalposition.

4. Metal bending apparatus comprising, in combination, a stationarybending form, having a cylindrical portion, means for maintainin a metalstrip against the form, an oscillata ble support rotating about the axisof the cylindrlcal portion of the stationary form, a forming blockcarried by said support eccentric to said axis and having a surfaceadapted to engage the strip and cause it to be bent around saidcylindrical portion, a power shaft, a train of mutilated gears fortransmitting motion from the power shaft to the rotatable support in onedirection to cause the block to bend the strip, and a clutch forconnecting the power shaft with the mutilated gear train, means forcausing the clutch to be engaged, a spring forreturning the rotatablesupport to normal position, and means for automatically causing theclutch to be disengaged at the end of one cycle of operation of theapparatus.

5. Metal bending and cutting apparatus comprising in combination, astationary form having a cylindrical surface about which a metal stripmay be bent, means for maintaining a metal strip against the form, amember adapted to oscillate around the axis of the cylindrical surfaceof said stationary form, means carried by said member for bending thestrip around said cylindrical surface and for severing the strip at apredetermined location relative to the bent port-ion subsequent to partof the bending operation.

6. Metal bending and cutting apparatus comprising in combination, astationary form having a cylindrical surface about which a metal stripmay be bent means for maintaining a metal strip against the form, amember adapted to oscillate around the axis of the cylindrical surfaceof said stationary form, means carried by said member for bending thestrip around said cylindrical surface, means cooperating with thebending means for severing the strip at a predetermined po sitionrelative to its bent portion, and means for oscillating said member.

7 Metal bending and cutting apparatus comprising in combination, astationary form having a cylindrical surface about which a metal stripmay be bent, means for maintaining a metal strip against the form, amember adapted to oscillate around the axis of the cylindrical surfaceof said stationary form, and to bend the strip around said cylindricalsurface, cutting means including a movable cutter carried by saidoscillatable member for severing the strip at a predetermined locationrelative to its bent portion after part of the bending operation is completed and means for oscillating said member.

8. Metal bending and cutting apparatus comprising in combination, astationary form nature.

LORA E. POOLE.

